Luke had spent a week visiting his family in Kentucky. His sister-in-law and seven-year-old nephew went with him to the airport.

After verifying his seat number with the counter attendant, Luke walked back to his relatives and said he had to wait an additional three hours in the airport.

“How come?” his nephew asked. “My plane has been grounded,” Luke explained. “Grounded?” the little boy said, “I didn’t know planes had parents”.